Running Windows RT Applications

You can find a list of such ported applications at forum.xda-developers.com.
To run them you'll need a recent Wine and a Linux Kernel with the tpidrurw patch, it's included since Kernel 3.11-rc1.
When you're unsure if the Kernel you are using supports it, you can clone, make and run tpidrurw-test, it'll tell you if your Kernel is suitable.

Running Windows CE Applications

That's still pre-alpha/proof-of-concept and not part of official Wine, don't expect any success. WineCE can be found at github.